Current state of the art: solar panels and solar water heaters?

The glass heat pipe solar water heater which with all closed vacuum tubes, the condensation is inserted into the water tank. In the tubes filled with heat transfer medium, sunlight absorbed by vacumm tubes and converted into heat energy to heat the medium, the medium vapored after heat absorption. Vapor flows to the condensation section under the inner pipe pressure, and meawhile turns liquefy and release heat to water in water tank.

Conduction fluid condensed at the condensation section back to evaporator section caused by gravity, finally, the water heated.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.